Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Solid-phase OMS-2 molecular sieve catalyst for purifying formaldehyde at room temperature and preparation method thereof

An OMS-2, formaldehyde purification technology, applied in molecular sieve catalysts, physical/chemical process catalysts, separation methods, etc., can solve problems such as high price, and achieve low price, simple and easy preparation method, and excellent carbon dioxide generation selectivity. Effect

Active Publication Date: 2020-06-12
ZHEJIANG UNIV
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, the catalysts that can eliminate formaldehyde at room temperature are mainly platinum-based catalysts. These noble metals are expensive, which brings great challenges to the large-scale promotion of catalysts.
Therefore, it is a great challenge to develop relatively cheap catalysts for the complete degradation of formaldehyde at room temperature.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Solid-phase OMS-2 molecular sieve catalyst for purifying formaldehyde at room temperature and preparation method thereof
  • Solid-phase OMS-2 molecular sieve catalyst for purifying formaldehyde at room temperature and preparation method thereof
  • Solid-phase OMS-2 molecular sieve catalyst for purifying formaldehyde at room temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Immerse the solid-phase OMS-2 molecular sieve as a carrier in an aqueous solution containing silver nitrate, ultrasonicate for 30 minutes, stir for 4 hours, and age overnight; stir the mixed solution with a glass rod at 80°C, evaporate the water in the mixed solution to dryness, The active components are uniformly loaded on the solid-phase OMS-2 molecular sieve, and then dried at 100°C for 5 hours; then moved to a muffle furnace under air conditions, and baked at 450°C for 5 hours; OMS- 2 After the molecular sieve is calcined, a catalyst with silver ions as active components is obtained. The mass content of active components in the catalyst is 0.1%, and the catalyst is sieved into particles with a size of 40-60 meshes for use.

Embodiment 14

[0026] Except for Example 14, the solid-phase OMS-2 provided in other examples of the present application are all cryptopotassium manganese oxide octahedral molecular sieves synthesized by a solvent-free method. Specific process example:

[0027] 9.489g (0.06mol) KMnO 4 and 22.059g (0.09mol) Mn(Ac) 2 4H 2 Mix O into a mortar, grind at room temperature for 0.5 hours; then transfer to a crystallization kettle, and crystallize at 80°C for 4 hours; filter, wash, and dry the solid obtained after crystallization, and bake at 400°C for 5 hours , finally get the solid phase OMS-2 molecular sieve as carrier.

Embodiment 2

[0029] The rest are the same as in Example 1, except that the percentage of silver ions is 0.5%, ultrasonic for 5 minutes, stirred for 1 hour, dried at 100° C. for 3 hours, and roasted at 450° C. for 1 hour under air conditions.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of environmental catalysis, and aims to provide a solid-phase OMS-2 molecular sieve catalyst for room-temperature formaldehyde purification and a preparation method thereof. According to the catalyst, cryptomelane type manganese oxide octahedral molecular sieve is used as a carrier, silver loaded with ions is used as an active component accounting for 0.1-20% of the weight of the catalyst. Non-toxic and harmless components are adopted in the preparation process, so that harm to human health and the ecological environment is avoided, and the preparation method is simple and easy to implement. The catalyst can hold 100% formaldehyde removal rate in a wide temperature operation range and a wide airspeed operation range. Compared with an existing noble metal catalyst for room-temperature catalytic oxidation of formaldehyde, the Ag-loaded solid-phase OMS-2 molecular sieve catalyst is relatively low in price and is more suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of environmental catalysis, in particular to a solid-phase OMS-2 molecular sieve catalyst and a preparation method for purifying formaldehyde in indoor and stationary source exhaust gases at room temperature. Background technique [0002] At present, the concentration of formaldehyde in the indoor environment is very serious, and most of the pollution is caused by excessive formaldehyde. Indoor air pollution causes 4.3 million deaths worldwide every year, so formaldehyde pollution can cause great harm to people's physical and mental health. Due to the wide range of sources of formaldehyde, formaldehyde will be produced in food, clothing, housing and transportation, and the release cycle will be as long as 10 to 15 years. This has brought great trouble to the treatment of formaldehyde pollution, and the existing formaldehyde purification technology is mainly based on activated carbon adsorption technology, p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/00B01J23/50B01D53/86B01D53/72
CPCB01D53/8668B01D2257/70B01J23/50B01J29/00
Inventor 孟祥举肖丰收章凌
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com